I too would feel sad Convinced, but it would be out of concern for the children and the struggles that she will have to go through. I think any good friend, knowing that their friend is already struggling, would be affraid that things would only be harder and the children would suffer. But if she can handle it, be happy for her and support her in any way you can.
I had a friend, who was married to a dentist and had lots of money, tell me that she was pregnant with her first child. I was sad. It was because she and her husband faught all the time and I didn't sense any love in the relationship ( she married him at 21 and he was 34). I was affraid that she thought the pregnancy would help the marriage. I was also sad that the child would have to be brought up in a home with parents who were always at each others throats. My heart sank when she told me she was pregnant. But she was happy and I was happy that she was happy because there was nothing that I could do about it. I did express my concerns to her, however, and she was very greatful that I did because she had been wanting to talk to someone about it for a long time. She and I are like sisters to this day, and that one conversation was the key, because it showed her that I was genuinly concerned for her and the wellbeing of her unborn child (my God daughter
).